JPH09105222A - Straw matting (tatami) - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of mite and mold by arranging a nonwoven fabric of polypropylene fiber, into which soluble glass including silver ion is kneaded, between the mat and base of straw matting (tatami). SOLUTION: Antibacterial and antimold deodorizing insect-proof soluble glass powder, in which P2 O5 , MgO, Al2 O3 and Ag2 O are blended and which includes silver ion, at 50μm or less of grain diameter is adjusted at 30% by weight. Next, glass powder is blended in the polypropylene, and while melt spinning is performed so as to form the short fiber. The short fiber is processed through heating so as to form a nonwoven fabric 3. Furthermore, this nonwoven fabric 3 is arranged between the mat 2 and base 1 of the tatami. With this structure, an appropriate quantity of silver ion is solved out for a long time, and seeped out to the mat 2 and base 1 of the tatami, the generation of mite and mold can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tatami mat having an antibacterial and antifungal and deodorant insecticidal function, and more particularly to a tatami mat having an antibacterial and antifungal and deodorant insecticidal effect which prevents the generation of mold, dani and the like.

[0002]

2. Description of the Related Art Conventionally provided tatami mats have a structure in which a tatami mat is attached to the floor. Therefore, molds due to moisture are generated, and an offensive odor is generated. However, there is a drawback that it is difficult to keep the tatami mat clean.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and its object is to:
Prevents the generation of dani and mold, and the generation of offensive odors,
Another object is to provide a new tatami mat having an antibacterial function.

[0004]

A tatami mat according to the present invention has a polypropylene fiber non-woven fabric disposed between a tatami mat and a floor.
The polypropylene fiber is characterized in that soluble glass containing silver ions and having a particle diameter of 50 μm or less is kneaded at a ratio of 30% by weight or less. In these tatami mats having an antibacterial / antifungal / deodorant insecticidal function, the soluble glass containing silver ions has a composition ratio of P ₂ O ₅ of 49-
51 mol%, 43 to 45 mol% of MgO, and 5 to 7 mol% of Al ₂ O ₃ are added to 0.1 to ₂ mol% of Ag ₂ O.
It is advisable to add 0.7% by weight.

In the present invention, the synthetic fibers that can be used as the constituent fibers of the non-woven fabric are limited to polypropylene fibers. If it is not made of hydrophobic fiber, silver ions will elute too much due to water absorption of the fiber during many years of use, and the antibacterial, antifungal, deodorant and insecticidal action will be deteriorated. A typical example of the hydrophobic fiber is a polyolefin fiber,
Polypropylene fibers and polyethylene fibers are representative of polyolefin fibers. However, the latter is not limited to polypropylene fibers because fine fibers cannot be obtained.

Organic solvent-based adhesive components (binders) such as urethane, acryl, synthetic rubber latex, and melamine emulsion can be used as the fiber adhesive for making the nonwoven fabric.

In addition to the method of using the above-mentioned binder, the method of making a non-woven fabric includes a method of melt-bonding a felt-like fiber web, and a mechanical method of tying the fibers together by a needle punching method.

The soluble glass containing silver ions used in the present invention is a general term for glass whose composition is adjusted in consideration of the physical and chemical characteristics of glass so as to exhibit a limited melting rate. Thus, a soluble glass containing silver ions can elute silver ions at a defined rate over the years. Then, the eluted silver ions are adsorbed on the cell walls of bacteria and microorganisms or condensed in the cell membrane, which inhibits the growth of bacteria and microorganisms by the so-called oligodynamic effect, and prevents the generation of body odors and the generation of offensive odors. be able to.

Generally, fungi, bacteria, and sea urchins proliferate when the humidity is high, and when the humidity is low, the fungi and bacteria do not proliferate very much. In contrast, soluble glass elutes many of its components when the temperature and humidity are high,
When the temperature and humidity are low, the components are not eluted so much, so that it is in direct proportion to the growth of mold and bacteria. That is, when bacteria or the like are easily propagated, a large amount of the antibacterial / antifungal / deodorant insecticidal ingredient is eluted from the soluble glass. It is designed not to be eluted.

The amount of the soluble glass added varies depending on the particle size, but when the particle size is 50 μm or less, the range is preferably 0.1 to 30% by weight based on the weight of the nonwoven fabric. Antibacterial, antifungal, deodorant and insecticidal components that can be contained in soluble glass can be used as metals that release ions as antibacterial and antifungal and deodorant insecticides. , Its antibacterial, antifungal, deodorant and insecticidal properties are limited to those that release silver ions.

The amount of silver ions eluted from the nonwoven fabric constituting the tatami mat obtained in the present invention is 10 ng / c in distilled water at 20 ° C.
At m ² / day or more, favorable results were obtained by inhibiting the propagation of bacteria and mold, and the development of dandruff by the action of oligodynamics. The eluted silver ion exudes to the tatami mat and the floor, exerts its antibacterial and antifungal deodorant and insecticidal action on the entire tatami mat and continues.

Examples of the soluble glass component usable in the present invention include network-forming oxides such as SiO ₂ , B ₂ O ₃ and P ₂ O ₅ , or Na ₂ O, K ₂ O, CaO and Mg.
It is composed of a network-modifying oxide such as O, BaO, Al ₂ O ₃ , TiO ₂ , and ZnO, and when it absorbs moisture, the water dissolves the soluble glass little by little, and silver contained in the glass composition. Any substance that elutes ions can be used without particular limitation.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a tatami mat according to the present invention will be described with reference to the drawings. In the figure, 1 is a tatami floor and 2 is a tatami mat. In the present invention, the nonwoven fabric 3 is arranged between the floor 1 and the tatami mat 2.

As the non-woven fabric 3, the following two types of polypropylene fiber non-woven fabric containing silver ion-containing molten glass powder were used. Example 1 When polypropylene was melt-spun, its particle size was 25 μm.
50 mol% of P ₂ O ₅ pulverized to m or less, MgO 4
4 mol%, Al ₂ O ₃ 6 mol%, Ag ₂ O0.5 wt% antibacterial and antifungal deodorant insecticidal soluble glass powder having a composition ratio of 1.5% by weight uniformly blended to polymer weight Then, melt spinning was performed to obtain short fibers having a fiber length of 30 mm and a fineness of 3 denier. This short fiber was dispersed in water using a paper making machine to make a paper. Further, it was heat-pressed (at about 130 ° C.) with a calender roll machine and then heat-treated at 150 ° C. for 1 minute to finish a nonwoven fabric having a basis weight of 30 to 35 g / m ² .

25 cm ^{2 of} this non-woven fabric was cut, and the temperature was 2
When the silver ion elution amount was measured by immersing it in 50 cc of water at 0 ° C. for 24 hours, a result of 40 ng / cm ² / day was obtained. In addition, this non-woven fabric is 9 cm ² (3 cm x 3 c
The sample was cut into a size of m), coated with a spore suspension of green mold on a normal broth agar medium, and placed on the medium, and cultured at 24 ° C. for 4 weeks. Then, the length of the mold growth inhibition zone was measured, and the result was that no blue mold was found around 2 to 3 mm around the nonwoven fabric according to the present invention. It should be noted that no yellowing occurred in the non-woven fabric during these 4 weeks.

Example 2 A non-woven fabric obtained by heat-sealing commercially available polypropylene (Basis weight 30
0 g / m ² ) was obtained. Soluble glass (P ₂ O ₅ 6
With respect to the basic glass composition of 5 mol%, CaO 15 mol%, Na ₂ O 14 mol% and Al ₂ O ₃ 6 mol%, A
A glass prepared by adding 1.0% by weight of g ₂ O to a particle size of 20 μm or less) was added to the acrylic aqueous emulsion so as to be 5% by weight / volume to prepare a suspension.
After putting the above-mentioned non-woven fabric into a bath of this liquid, the liquid is squeezed with a nip roller to remove excess water, and then at 140 ° C. for 30 minutes.
It was heat-bonded over a period of time and finished into a non-woven fabric with antibacterial, antifungal, deodorant and insecticidal functions.

25 cm ² of this non-woven fabric is placed in 20 ° C. water for 24 hours.
The elution amount of silver after the time immersion was measured. Soluble glass deposition amount 8.0 g / m ² , silver ion elution rate 700 ng /
The result was cm ² / day. Next, to prevent the growth of green mold, the temperature was 25 ° C on potato dextrose agar medium.
After culturing for 1 week in, the growth inhibition zone was observed. No blue mold was found around 5 mm around the nonwoven fabric. Furthermore, after this, after immersing this test subject in water for 1 day, it was also observed that the deterioration of the blue mold growth inhibition function due to the elution of silver ions was observed. However, the length of the blue mold inhibition zone was only slightly reduced to 4 mm, and the antibacterial activity was decreased. As a result, we obtained tatami mats with antifungal and deodorant effects. Even if the non-woven fabric 3 is replaced with a resin film in which a soluble glass containing silver ions is dispersed and contained, substantially the same effect can be obtained.

[0018]

According to the present invention, since the hydrophobic polypropylene fiber is used as the fiber material of the non-woven fabric forming the tatami mat, it is possible to continue eluting a suitable amount of silver ions for many years. Further, since the composition of the soluble glass having an antibacterial antifungal deodorant insecticidal function and its addition amount can be selected in a considerably wide range, the antibacterial antifungal deodorant insecticidal function can have a wide range,
Furthermore, since the component having an antibacterial / antifungal / deodorant and insecticidal function is limited to a silver compound that is safe for the human body, it can be used as a tatami mat without any problems in terms of safety and hygiene.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a tatami mat according to the present invention.

[Explanation of symbols]

 1 tatami floor 2 tatami mat 3 non-woven fabric

Claims (1)

[Claims] 1. A non-woven fabric of polypropylene fiber is provided between a tatami-mat and a floor, and the polypropylene fiber is made of a soluble glass containing silver ions and having a particle diameter of 50 μm or less.
A tatami mat that is kneaded in a proportion of not more than wt%.